The cleaning and pollution control of ventilation systems in the catering and hotel industry has become an ever greater concern in recent years. INDUS cleans all types of ventilation systems according to ÖNORM H6030 (VDI 6022), with certificate for submission to regulators. By fatty deposits in the channel or in the grease filter, there is considerable risk of fire through flashover by flame from the heat. If not cleaned and highly fatty degeneration kitchen exhaust systems of the insurance cover is at risk due to neglect of duty of care and favoring flammable substances. (See Addendum provisions ventilation)